Unusual arrangement and behaviour of the sex chromosomes of Aphodius (Agolius) abdominalis Bonelli, 1812, and comparison with A. (A.) bonvouloiri Harold, 1860 (Coleoptera: Aphodiidae) | Zendy

Robert B. Angus | Zendy

Open Access

Unusual arrangement and behaviour of the sex chromosomes of Aphodius (Agolius) abdominalis Bonelli, 1812, and comparison with A. (A.) bonvouloiri Harold, 1860 (Coleoptera: Aphodiidae)

Author(s) -

Robert B. Angus

Publication year - 2009

Publication title -

comparative cytogenetics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.49

H-Index - 20

eISSN - 1993-078X

pISSN - 1993-0771

DOI - 10.3897/compcytogen.v3i2.15

Subject(s) - autosome , biology , karyotype , bivalent (engine) , meiosis , genetics , x chromosome , centromere , zoology , subgenus , chromosome , taxonomy (biology) , gene , chemistry , organic chemistry , metal

Aphodius abdominalis Bonelli, 1812 is shown to have a karyotype comprising nine pairs of autosomes and sex chromosomes which are X0 (male), XX (female). At first metaphase of meiosis the X chromosome is linked to an autosomal bivalent by a darkly staining area of the cytoplasm, resembling the Xy p arrangement typical of Aphodius species, but giving nine, rather than 10, elements in the nucleus. C-banding, which shows the centromeres, confirms this unusual arrangement. A. bonvouloiri, the only other known species of subgenus Agolius Mulsant et Rey, 1869, has a male karyotype with nine pairs of autosomes and Xy sex chromosomes. No preparations of its meiosis are available

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